SQL Pivot没有总结所有结果

我最近做了一个SQL PIVOT，我发现它不太正常 . 这是我正在使用的

使用供应商视图的SQL Server 2005供应商数据库 - 我无法创建额外的表或视图或直接查询数据表（长篇文章）

我每月查询一组包含多个条目的数据，并将其与第二组联合以制作我称之为数据集的数据 . 我正在使用CASE WHEN对对象进行分组（即dbid 1,7和10的结果为'a'，2,3和9为'b'等 .

我正在转动数据集以按月显示总量 .

我的问题是其中一个列，它没有计算数据集中的所有结果，看起来是一年中的一个月 . 仔细研究后，我发现缺少的数据似乎是两行数据在下面的查询中对N_Entered具有相同值的情况 .

我设法使用通用查询重建问题（如下） . 我在sql server express 2008 r2和sql server 2005上运行这个，我得到了相同的结果 - 这是

Begin_Time Totals A苹果B香蕉香蕉C胡萝卜胡萝卜D狗狗2014-02-01 00：00：00.000 174732 44000 4591 581 208

2014年2月的B总和为4594，但此查询返回4591.您将注意到表2中'2'的两个条目，其中'3'为N_Entered .

如果我删除与table2联合数据集的部分 - 我得到正确的答案 - 4594 .

我的100万美元的问题是

• 如何在枢轴中获得正确的结果？

• 为了我自己的学习 - 我做错了什么？

此代码与我的 生产环境 查询之间存在差异

我从 生产环境 中的视图中选择而不是使用表格变量 生产环境 Span 超过一年的结果，我只是将'datediff子句保留为尽可能保持尽可能接近 .

非常感谢你！

declare @vartable as table (Begin_Time DateTime, Letter varchar(30), N_Entered int) 
declare @vartable2 as table (Begin_Time DateTime, Letter varchar(30), N_Entered int) 

--populate first table
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'D', 125) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'B', 2519) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'A', 23) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'A', 271) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'B', 9) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'B', 3) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values  ('2014-02-01 00:00:00', 'B', 37) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'A', 357) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'A', 24230) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'A', 9) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'D', 83) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'B', 1998) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'A', 13) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'A', 217) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'B', 3) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'B', 1) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'B', 24) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'A', 212) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'A', 18656) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'A', 12) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'C', 272) 
insert into @vartable (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'C', 309) 

--populate second table
insert into @vartable2 (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'T',  1009) 
insert into @vartable2 (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'T', 90810) 
insert into @vartable2 (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'T', 198) 
insert into @vartable2 (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'T', 253) 
insert into @vartable2 (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'T', 447) 
insert into @vartable2 (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'T', 829) 
insert into @vartable2 (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'T', 80427) 
insert into @vartable2 (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'T', 152) 
insert into @vartable2 (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'T', 149) 
insert into @vartable2 (Begin_Time, Letter, N_Entered) Values ('2014-02-01 00:00:00', 'T', 458) 

SELECT * FROM 
(SELECT Begin_Time, 
CASE Letter 
        WHEN 'A' THEN 'A Apples' 
        WHEN 'B' THEN 'B Banana Bananas' 
        WHEN 'C' THEN 'C Carrot Carrots' 
        WHEN 'D' THEN 'D Dog Dogs' 
ELSE Letter 
END 'Option Selected' 
, N_Entered 
From @vartable 
WHERE (Datediff(month, begin_time, getdate()) Between 1 and 12) 
AND Letter IN ( 'A', 'B', 'C', 'D' )  -- end first select 

--removing this union section does give the right answer

UNION 
( 
SELECT Begin_Time, 'Totals' as 'Total Numbers', Sum(N_Entered) As N_Entered 
        FROM @vartable2 
                WHERE   

                          Letter IN ('T') 
                         AND (Datediff(month, begin_time, getdate()) Between 1 and 12) 
                GROUP BY begin_time 
        )  -- end second select 

-- end of union section

) As Data 

PIVOT 

( 
SUM(N_ENTERED) 
FOR [Option Selected] IN ([Totals], [A Apples], [B Banana Bananas], [C Carrot Carrots], [D Dog Dogs]) 
) 
As PivotTable;